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本帖最后由 kuacuia 于 2026-8-15 11:28 编辑
我测试过电脑直连那个最接近nbn盒子的楼下新路由器,ping 8.8.8.8没反应,更别提ping google了。确定是外网断了。我看了下主路由器R7800日志,发现了昨天下午4点左右断网前后这些日志(1.2.3.4我家公网ip):
[Internet connected] IP address: 1.2.3.4, Friday, August 14, 2026 22:02:42
[DoS Attack: TCP/UDP Echo] from source: 119.40.106.35, port 53, Friday, August 14, 2026 22:01:47
[Internet connected] IP address: 1.2.3.4, Friday, August 14, 2026 20:22:42
[DoS Attack: SYN/ACK Scan] from source: 180.153.201.124, port 80, Friday, August 14, 2026 20:18:31
[Internet connected] IP address: 1.2.3.4, Friday, August 14, 2026 20:07:41
[DoS Attack: Ascend Kill] from source: 119.40.106.35, port 53, Friday, August 14, 2026 20:06:30
[Internet connected] IP address: 1.2.3.4, Friday, August 14, 2026 19:37:41
[Internet connected] IP address: 1.2.3.4, Friday, August 14, 2026 18:22:40
[DoS Attack: SYN/ACK Scan] from source: 112.19.142.236, port 443, Friday, August 14, 2026 18:22:29
[Internet connected] IP address: 1.2.3.4, Friday, August 14, 2026 16:22:35
[DoS Attack: Ascend Kill] from source: 119.40.106.35, port 53, Friday, August 14, 2026 16:20:00
[Internet connected] IP address: 1.2.3.4, Friday, August 14, 2026 16:12:34
[DoS Attack: SYN/ACK Scan] from source: 112.19.142.236, port 443, Friday, August 14, 2026 16:11:27
[Internet connected] IP address: 1.2.3.4, Friday, August 14, 2026 15:12:32
[Internet connected] IP address: 1.2.3.4, Friday, August 14, 2026 14:57:31
[DHCP IP: 192.168.1.2] to MAC address f...:38, Friday, August 14, 2026 14:54:11
[Internet connected] IP address: 1.2.3.4, Friday, August 14, 2026 14:52:31
[DoS Attack: RST Scan] from source: 101.32.118.25, port 8080, Friday, August 14, 2026 14:51:44
[Time synchronized with NTP server] Friday, August 14, 2026 14:47:36
[Internet connected] IP address: 1.2.3.4, Friday, August 14, 2026 14:47:31
按照ai建议,我勾选了wan setup下面两个可能消耗路由器cpu的选项:Disable Port Scan and DoS Protection, NAT Filtering/Disable SIP ALG
ai说这个选项Disable Port Scan and DoS Protection会导致大量false positive,勾选并不会影响家里网络安全。
https://community.netgear.com/di ... 133/replies/2133401
同时也关闭了security的access control,估计这个也很消耗cpu
关闭了uPnP
连 nbn 盒子的网线一开始就已经是 cat 6。
我在想,之前会不会就是因为以上各种消耗 cpu 的选项启用了,才导致主路由器 dhcp 服务死掉,经常无法更新获取公网动态分配的 ip 地址新租约才导致的断网?
先观察一周看看断网问题有没改善,finger crossed
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